The repairs performed on the International Space Station's cooling system Monday morning appear to be working.
NASA astronauts Doug Wheelock and Tracy Caldwell Dyson installed a spare 780-pound ammonia pump module to replace a broken unit that they removed last Wednesday, NASA said on its website. Wheelock attached four bolts and Caldwell Dyson mated five electrical connectors, then ground controllers confirmed the module was in healthy condition when it began receiving power. After a pressure check and more fluid cable connections, ammonia began to flow into the module, NASA said.
All of the fluid lines are connected and no ammonia leaks were reported, according to NASA's Twitter feed.